{ "schemaVersion": 1, "checkedOn": "2026-09-23", "infrastructureSnapshotId": "dba1e9f3980f467a87f15a01", "submarineResponseSha256": "0638ff92334fa73e3587008b351e2709cfd22b2eadaa6aa46bf631dafa67bb77", "boundary": "Corporate and named-system evidence matched by exact source labels; not legal title to individual map segments. Original owner/operator fields are preserved. Percentages at different corporate levels must not be added together. Source dates and review dates are separate.", "sources": { "mdbc": { "title": "Maryland Broadband Cooperative · member ownership", "url": "https://mdbc.us/about/", "date": null }, "dixie": { "title": "Dixie Electric · cooperative ownership and DE Fastlink", "url": "https://www.dixieepa.com/my-co-op/who-we-are/", "date": null }, "att": { "title": "AT&T · 2026 first-quarter filing, holding company and operating subsidiaries", "url": "https://www.sec.gov/Archives/edgar/data/732717/000073271726000206/t-20260331.htm", "date": "2026-03-31" }, "conexon": { "title": "Conexon · Florida PSC ownership statement", "url": "https://www.floridapsc.com/pscfiles/library/filings/2025/00502-2025/00502-2025.pdf", "date": "2025-01-15" }, "wcu": { "title": "Western Carolina University · network responsibilities", "url": "https://www-redesign.wcu.edu/discover/leadership/office-of-the-chancellor/legal-counsel-office/university-policies/numerical-index/university-policy-95.aspx", "date": null }, "arundel": { "title": "Anne Arundel County · network infrastructure department", "url": "https://www.aacounty.org/oit", "date": null }, "northwestern": { "title": "NorthWestern · 2025 annual report, corporate structure", "url": "https://rates.northwesternenergy.com/docs/default-source/default-document-library/about-us/investors/annual-reports/2025_annual_report_final_10k_web.pdf", "date": "2025-12-31" }, "northwesternGas": { "title": "NorthWestern · 2026 Montana plan, gas transmission ownership and operations", "url": "https://northwesternenergy.com/docs/default-source/default-document-library/about-us/erp-irp/2026-mt-irp-public.pdf", "date": "2026" }, "nicor": { "title": "Southern Company Gas · Nicor ownership in January 2026 filing", "url": "https://www.sec.gov/Archives/edgar/data/1004155/000100415526000002/so-20260109.htm", "date": "2026-01-09" }, "nicorHistory": { "title": "Nicor · corporate ownership history", "url": "https://www.nicorgas.com/company/about-us/history.html", "date": null }, "atmos": { "title": "Atmos Energy · operating divisions", "url": "https://www.atmosenergy.com/sustainability/overview/", "date": null }, "nationalFuel": { "title": "National Fuel · 2024 annual report, operating subsidiaries", "url": "https://www.nationalfuel.com/wp-content/uploads/documents/2024-Annual-Report.pdf", "date": "2024-09-30" }, "dg": { "title": "Deutsche Glasfaser · shareholders and operations", "url": "https://www.deutsche-glasfaser.de/unternehmen/investor-relations", "date": null }, "nsp": { "title": "Nova Scotia Power · company ownership", "url": "https://www.nspower.ca/about-us/who-we-are", "date": null }, "evf": { "title": "EVF · municipal shareholders", "url": "https://evf.de/unternehmen/news/details/968398.evf-gruendet-gemeinsam-mit-dem-zweckverband-landeswasserversorgung-die-kooperationsgesellschaft-windpark-lonsee.html", "date": "2026-05-06" }, "czela": { "title": "czela.net · association statutes", "url": "https://www.czela.net/wp-content/uploads/2025/06/Stanovy_final_od-1_7_2025.pdf", "date": "2025-07-01" }, "turkcell": { "title": "Turkcell · 2024 Form 20-F, subsidiaries", "url": "https://s.turkcell.com.tr/SiteAssets/Hakkimizda/yatirimci-iliskileri/documents/pdf/20F2024.pdf", "date": "2024-12-31" }, "versatel": { "title": "1&1 Versatel · legal imprint and group", "url": "https://www.1und1.net/impressum", "date": null }, "ugg": { "title": "Telefónica Infra · UGG ownership", "url": "https://www.telefonica.com/en/t-infra/portfolio/ugg/", "date": null }, "openfiber": { "title": "Open Fiber · company structure", "url": "https://openfiber.it/en/about-us/governance/company-structure/", "date": null }, "bce": { "title": "BCE · 2025 Annual Information Form, subsidiary voting interests", "url": "https://www.bce.ca/cs-assets/2025-bce-annual-information-form.pdf-blt20614b86ec65e8b6", "date": "2025-12-31" }, "bell": { "title": "BCE · Bell brands and businesses", "url": "https://www.bce.ca/about-bce/about-us", "date": null }, "lumen": { "title": "Lumen · completed consumer-fiber sale and retained backbone", "url": "https://ir.lumen.com/news/news-details/2026/Lumen-Completes-Sale-of-Consumer-Fiber-to-the-Home-Business-to-ATT/", "date": "2026-02-02" }, "frontier": { "title": "Verizon · 2025 Form 10-K, Frontier subsequent event", "url": "https://www.sec.gov/Archives/edgar/data/732712/000073271226000007/vz-20251231.htm", "date": "2026-01-20" }, "arelion": { "title": "Arelion · ownership FAQ", "url": "https://www.arelion.com/faq", "date": null }, "tampnet": { "title": "Tampnet · ownership", "url": "https://www.tampnet.com/about", "date": null }, "telxius": { "title": "Telefónica · Telxius shareholder interests", "url": "https://www.telefonica.com/en/communication-room/press-room/antonio-ledesma-ceo-telxius/", "date": "2026-02-26" }, "iroquois": { "title": "Iroquois · legal partners and ownership percentages", "url": "https://www.iroquois.com/company/ownership/", "date": null }, "nng": { "title": "Northern Natural Gas · operator and parent", "url": "https://www.northernnaturalgas.com/about-us/", "date": null }, "bhe": { "title": "Berkshire Hathaway Energy · 2024 Form 10-K", "url": "https://www.brkenergy.com/assets/upload/financial-filing/20241231_BHE%20Form-10-K.pdf", "date": "2024-12-31" }, "cgt": { "title": "PG&E · California Gas Transmission business", "url": "https://www.pge.com/pipeline/en/about-cgt.html", "date": null }, "williams": { "title": "Williams · 2024 Form 10-K, pipeline subsidiaries", "url": "https://www.sec.gov/Archives/edgar/data/99250/000010726325000031/wmb-20241231.htm", "date": "2024-12-31" }, "anr": { "title": "TC Energy · ANR Pipeline", "url": "https://www.tcenergy.com/operations/natural-gas/anr-pipeline/", "date": null }, "gtn": { "title": "TC Energy · Gas Transmission Northwest", "url": "https://www.tcenergy.com/operations/natural-gas/gas-transmission-northwest/", "date": null }, "tc": { "title": "TC Energy · corporate and pipeline history", "url": "https://www.tcenergy.com/about/our-legacy/", "date": null }, "km": { "title": "Kinder Morgan · pipeline ownership and operating roles", "url": "https://www2.kindermorgan.com/Operations/Natural-Gas/Index", "date": null }, "nexus": { "title": "NEXUS · joint-venture partners", "url": "https://www.nexusgastransmission.com/about/nexus-partners", "date": null }, "tetco": { "title": "Enbridge · Texas Eastern ownership", "url": "https://www.enbridge.com/projects-and-infrastructure/projects/appalachia-to-market-iii-project", "date": null }, "enbridge": { "title": "Enbridge · gas transmission businesses", "url": "https://www.enbridge.com/about-us/natural-gas-transmission-midstream-and-lng", "date": null }, "dtm": { "title": "DT Midstream · 2025 Form 10-K, acquired pipeline interests", "url": "https://www.sec.gov/Archives/edgar/data/1842022/000184202226000003/dtm-20251231.htm", "date": "2025-12-31" }, "oneok": { "title": "ONEOK · natural gas pipeline interests", "url": "https://www.oneok.com/customers/ngp", "date": null }, "boardwalk": { "title": "Boardwalk · operating companies and Loews parent", "url": "https://www.bwpipelines.com/", "date": null }, "southernstar": { "title": "Southern Star · majority and minority investors", "url": "https://southernstar.com/southern-star-celebrates-120-years-of-service/", "date": "2024-08-23" }, "fortis": { "title": "FortisBC · gas utility, holding company and Fortis parent", "url": "https://www.fortisbc.com/about-us/corporate-information/investor-centre", "date": null }, "pembina": { "title": "Pembina · 2025 Annual Information Form, Alliance", "url": "https://www.sec.gov/Archives/edgar/data/1546066/000154606626000014/aifppcq42025.htm", "date": "2025-12-31" }, "allianceSale": { "title": "Pembina · Enbridge interest acquisition closed", "url": "https://www.pembina.com/media-centre/news/details/7a72147a-9fcd-4ddc-a631-b69788ea7d11", "date": "2024-04-01" }, "bt": { "title": "BT Group · 2026 full-year results, strategic shareholder", "url": "https://www.bt.com/content/dam/bt-plc/assets/documents/investors/financial-reporting-and-news/quarterly-results/fy26/h2/fy26-release.pdf", "date": "2026-03-31" }, "openreach": { "title": "Openreach · corporate ownership", "url": "https://www.openreach.com/about/our-company", "date": null }, "telenor": { "title": "Telenor · shares and shareholders", "url": "https://www.telenor.com/who-we-are/corporate-governance/telenors-share-and-shareholders/", "date": "2026-02-27" }, "tcAif": { "title": "TC Energy · 2025 Annual Information Form, voting interests", "url": "https://www.sec.gov/Archives/edgar/data/99070/000123238426000015/a12312025tceaifenglish.htm", "date": "2025-12-31" }, "columbia": { "title": "TC Energy · completed Columbia joint-venture sale", "url": "https://www.tcenergy.com/announcements/2023/2023-10-04-tc-energy-successfully-completes-%245.3-billion-sale-of-a-40-per-cent-non-controlling-equity-interest-in-columbia-gas-and-columbia-gulf", "date": "2023-10-04" }, "et": { "title": "Energy Transfer · 2025 Form 10-K, system ownership table", "url": "https://ir.energytransfer.com/static-files/50e7959e-16af-4b5a-9d97-9d2c96487794", "date": "2025-12-31" }, "westcoast": { "title": "Enbridge · Westcoast equity transaction closed July 2025", "url": "https://www.enbridge.com/investment-center/reports-and-sec-filings/sec-filings/sec-filing-details?docId=265233", "date": "2025-07-02" } }, "profiles": [ { "id": "maryland-broadband", "name": "Maryland Broadband Cooperative", "network": "fiber", "kind": "association", "aliases": [ "Maryland Broadband Cooperative", "Maryland Broadband Cooperative Inc.", "MdBC" ], "operators": [ "Maryland Broadband Cooperative" ], "ownership": [ { "name": "Cooperative members", "interest": "Member-owned nonprofit cooperative" } ], "note": "The cooperative publishes its ownership model and wholesale network role. This does not resolve title to each shared or leased strand.", "sources": [ "mdbc" ] }, { "id": "dixie-electric", "name": "Dixie Electric / DE Fastlink", "network": "fiber", "kind": "association", "aliases": [ "Dixie Electric Power Association", "DE Fastlink" ], "operators": [ "DE Fastlink · Dixie Electric" ], "ownership": [ { "name": "Dixie Electric members", "interest": "Member-owned cooperative; created DE Fastlink for fiber service" } ], "note": "The electric cooperative describes the creation of its fiber business. Legal title to the selected OSM segment remains unverified.", "sources": [ "dixie" ] }, { "id": "att", "name": "AT&T", "network": "fiber", "kind": "company", "aliases": [ "AT&T", "AT&T Inc.", "AT&T Corp." ], "operators": [ "AT&T operating subsidiaries; exact subsidiary not established by a generic map tag" ], "ownership": [ { "name": "AT&T Inc.", "interest": "Publicly traded holding company; services are provided by subsidiaries and affiliates" } ], "note": "An AT&T label identifies the group, not which operating subsidiary owns a strand. Acquiring consumer fiber does not transfer all Lumen backbone routes.", "sources": [ "att" ] }, { "id": "conexon", "name": "Conexon Connect", "network": "fiber", "kind": "company", "aliases": [ "Conexon Connect", "Conexon Connect, LLC" ], "operators": [ "Conexon Connect" ], "ownership": [ { "name": "Conexon, LLC", "interest": "Wholly owns the ISP company", "percent": 100 } ], "note": "Company ownership is distinct from the cooperative or investor ownership of networks it operates.", "sources": [ "conexon" ] }, { "id": "western-carolina", "name": "Western Carolina University network", "network": "fiber", "kind": "company", "aliases": [ "Western Carolina University" ], "operators": [ "WCU Information Technology · Networking & Communications" ], "ownership": [], "note": "University policy identifies the network department. It covers both university-owned and contracted resources, so the title to this individual segment is not independently established.", "sources": [ "wcu" ] }, { "id": "anne-arundel", "name": "Anne Arundel County network", "network": "fiber", "kind": "company", "aliases": [ "Anne Arundel County" ], "operators": [ "Anne Arundel County Office of Information Technology" ], "ownership": [], "note": "The county identifies its infrastructure and maintenance department. That establishes agency context, not title to every tagged fiber segment.", "sources": [ "arundel" ] }, { "id": "northwestern", "name": "NorthWestern Energy", "network": "gas", "kind": "company", "aliases": [ "Northwestern Energy Co", "NorthWestern Energy", "NorthWestern Corporation" ], "operators": [ "NorthWestern Corporation · Montana gas transmission" ], "ownership": [ { "name": "NorthWestern Energy Group, Inc.", "interest": "Wholly owns NorthWestern Corporation in the 2025 annual report", "percent": 100 } ], "note": "The report separates Montana from the Nebraska and South Dakota utilities. The announced Black Hills merger is not treated as a completed transaction; this ownership assertion is dated to the filing.", "sources": [ "northwestern", "northwesternGas" ] }, { "id": "nicor", "name": "Nicor Gas / Northern Illinois Gas", "network": "gas", "kind": "company", "aliases": [ "Northern Illinois Gas Co", "Northern Illinois Gas Company", "Nicor Gas" ], "operators": [ "Northern Illinois Gas Company (Nicor Gas)" ], "ownership": [ { "name": "Southern Company Gas", "interest": "Direct corporate parent", "percent": 100 }, { "name": "Southern Company", "interest": "Ultimate corporate parent" } ], "note": "The legal company uses the Nicor Gas trade name. The filing and company history identify the parent chain.", "sources": [ "nicor", "nicorHistory" ] }, { "id": "atmos-texas", "name": "Atmos Pipeline–Texas", "network": "gas", "kind": "system", "aliases": [ "Atmos Pipeline Texas", "Atmos Pipeline-Texas", "Atmos Pipeline – Texas" ], "operators": [ "Atmos Pipeline–Texas division" ], "ownership": [ { "name": "Atmos Energy Corporation", "interest": "Corporate division, not a separately inferred outside owner" } ], "note": "Atmos identifies its Texas pipeline division in its operations overview.", "sources": [ "atmos" ] }, { "id": "km-texas", "name": "Kinder Morgan Texas Pipeline", "aliases": [ "Kinder Morgan Texas Pipeline Co", "Kinder Morgan Texas Pipeline LLC" ], "network": "gas", "kind": "system", "operators": [ "Kinder Morgan Texas Pipeline" ], "ownership": [ { "name": "Kinder Morgan", "interest": "Corporate pipeline business identified in the current operations directory" } ], "note": "Corporate system context is linked to this exact pipeline label; no separate joint-venture percentage is inferred.", "sources": [ "km" ] }, { "id": "el-paso-natural", "name": "El Paso Natural Gas", "aliases": [ "El Paso Natural Gas Co", "El Paso Natural Gas", "El Paso Natural Gas Company, L.L.C." ], "network": "gas", "kind": "system", "operators": [ "El Paso Natural Gas" ], "ownership": [ { "name": "Kinder Morgan", "interest": "Corporate pipeline business identified in the current operations directory" } ], "note": "Corporate system context is linked to this exact pipeline label; no separate joint-venture percentage is inferred.", "sources": [ "km" ] }, { "id": "colorado-interstate", "name": "Colorado Interstate Gas", "aliases": [ "Colorado Interstate Gas Co", "Colorado Interstate Gas" ], "network": "gas", "kind": "system", "operators": [ "Colorado Interstate Gas" ], "ownership": [ { "name": "Kinder Morgan", "interest": "Corporate pipeline business identified in the current operations directory" } ], "note": "Corporate system context is linked to this exact pipeline label; no separate joint-venture percentage is inferred.", "sources": [ "km" ] }, { "id": "national-fuel-supply", "name": "National Fuel Gas Supply Corporation", "aliases": [ "National Fuel Gas Supply Co", "National Fuel Gas Supply Corporation" ], "network": "gas", "kind": "company", "operators": [ "National Fuel Gas Supply Corporation" ], "ownership": [ { "name": "National Fuel Gas Company", "interest": "Corporate parent in the 2024 annual report" } ], "note": "The supply/transmission business and distribution utility are separate operating subsidiaries.", "sources": [ "nationalFuel" ] }, { "id": "national-fuel-distribution", "name": "National Fuel Gas Distribution Corporation", "aliases": [ "National Fuel Gas Distr Co", "National Fuel Gas Distribution Corporation" ], "network": "gas", "kind": "company", "operators": [ "National Fuel Gas Distribution Corporation" ], "ownership": [ { "name": "National Fuel Gas Company", "interest": "Corporate parent in the 2024 annual report" } ], "note": "The supply/transmission business and distribution utility are separate operating subsidiaries.", "sources": [ "nationalFuel" ] }, { "id": "deutsche-glasfaser", "name": "Deutsche Glasfaser", "network": "fiber", "kind": "company", "aliases": [ "Deutsche Glasfaser", "Deutsche Glasfaser Holding GmbH" ], "operators": [ "Deutsche Glasfaser group" ], "ownership": [ { "name": "EQT Infrastructure", "interest": "Group shareholder", "percent": 51 }, { "name": "OMERS", "interest": "Group shareholder", "percent": 49 } ], "note": "The company publishes these group shareholdings and describes its fiber network operations.", "sources": [ "dg" ] }, { "id": "nova-scotia-power", "name": "Nova Scotia Power", "network": "fiber", "kind": "company", "aliases": [ "Nova Scotia Power", "Nova Scotia Power Inc." ], "operators": [], "ownership": [ { "name": "Emera Inc.", "interest": "Sole corporate owner", "percent": 100 } ], "note": "This establishes the utility’s corporate parent. Its role on this fiber line comes from the map tag.", "sources": [ "nsp" ] }, { "id": "evf", "name": "Energieversorgung Filstal (EVF)", "network": "fiber", "kind": "company", "aliases": [ "Energieversorgung Filstal", "Energieversorgung Filstal GmbH & Co. KG" ], "operators": [], "ownership": [ { "name": "Stadtwerke Göppingen", "interest": "Municipal shareholder", "percent": 86.75 }, { "name": "Stadtwerke Geislingen", "interest": "Municipal shareholder", "percent": 13.25 } ], "note": "Corporate ownership context for the EVF label; the source does not certify individual fiber segments.", "sources": [ "evf" ] }, { "id": "czela", "name": "czela.net, z. s.", "network": "fiber", "kind": "association", "aliases": [ "czela.net", "czela.net, z.s.", "czela.net, z. s." ], "operators": [], "ownership": [ { "name": "Association members", "interest": "Member-governed association; no corporate share percentages" } ], "note": "The statutes describe an association. Membership governance is not share ownership of each mapped cable.", "sources": [ "czela" ] }, { "id": "superonline", "name": "Superonline İletişim Hizmetleri A.Ş.", "network": "fiber", "kind": "company", "aliases": [ "Superonline", "Turkcell Superonline", "Turkcell Superonline Fiberoptik" ], "operators": [ "Superonline" ], "ownership": [ { "name": "Turkcell", "interest": "Corporate parent at 2024 year-end", "percent": 100 } ], "note": "The filed subsidiary interest is dated 2024-12-31.", "sources": [ "turkcell" ] }, { "id": "versatel", "name": "1&1 Versatel", "network": "fiber", "kind": "company", "aliases": [ "1&1 Versatel", "1&1 Versatel GmbH" ], "operators": [ "1&1 Versatel" ], "ownership": [ { "name": "1&1 AG", "interest": "Corporate parent" }, { "name": "United Internet", "interest": "Ultimate corporate group; no direct percentage asserted" } ], "note": "The current legal imprint identifies the parent and wider group.", "sources": [ "versatel" ] }, { "id": "ugg", "name": "Unsere Grüne Glasfaser (UGG)", "network": "fiber", "kind": "company", "aliases": [ "Unsere Grüne Glasfaser", "Unsere Grüne Glasfaser GmbH & Co. KG", "UGG" ], "operators": [ "Unsere Grüne Glasfaser" ], "ownership": [ { "name": "Telefónica group", "interest": "40% Telefónica Infra + 10% Telefónica Deutschland", "percent": 50 }, { "name": "Allianz Capital Partners investors", "interest": "Allianz insurance companies and European infrastructure fund", "percent": 50 } ], "note": "Joint-venture interests are company-level interests.", "sources": [ "ugg" ] }, { "id": "open-fiber", "name": "Open Fiber", "network": "fiber", "kind": "company", "aliases": [ "Open Fiber", "Open Fiber S.p.A." ], "operators": [ "Open Fiber" ], "ownership": [ { "name": "Open Fiber Holdings S.p.A.", "interest": "Direct sole shareholder", "percent": 100 }, { "name": "CDP Equity", "interest": "Interest in Open Fiber Holdings", "percent": 60 }, { "name": "Fibre Networks Holdings / Macquarie", "interest": "Interest in Open Fiber Holdings", "percent": 40 } ], "note": "The direct owner and the holding company’s shareholders are different levels of the ownership chain.", "sources": [ "openfiber" ] }, { "id": "bell", "name": "Bell Canada / Bell Aliant", "network": "fiber", "kind": "company", "aliases": [ "Bell Canada", "Bell Aliant" ], "operators": [ "Bell Canada" ], "ownership": [ { "name": "BCE Inc.", "interest": "Direct and indirect voting interest in Bell Canada at 2025 year-end", "percent": 100 } ], "note": "Bell Aliant is a Bell brand. The voting-interest figure applies to Bell Canada.", "sources": [ "bce", "bell" ] }, { "id": "ziply", "name": "Ziply Fiber", "network": "fiber", "kind": "company", "aliases": [ "Ziply Fiber", "Ziply" ], "operators": [ "Ziply Fiber" ], "ownership": [ { "name": "BCE Inc.", "interest": "Indirect voting interest in Northwest Fiber Ultimate Holdings at 2025 year-end", "percent": 100 } ], "note": "The filing places Ziply’s holding company within Bell Canada’s group.", "sources": [ "bce" ] }, { "id": "lumen", "name": "Lumen Technologies", "network": "fiber", "kind": "company", "aliases": [ "Lumen", "Lumen Technologies", "Lumen Technologies, Inc." ], "operators": [ "Lumen Technologies" ], "ownership": [ { "name": "Public shareholders", "interest": "Listed company; no single corporate parent established here" } ], "note": "Lumen’s February 2026 sale to AT&T covered consumer FTTH. Lumen said it retained its national, regional, state and metro backbone; this map does not transfer those lines to AT&T.", "sources": [ "lumen" ] }, { "id": "frontier", "name": "Frontier Communications", "network": "fiber", "kind": "company", "aliases": [ "Frontier", "Frontier Communications" ], "operators": [], "ownership": [ { "name": "Verizon Communications", "interest": "Corporate acquisition completed 2026-01-20" } ], "note": "The filing documents the completed acquisition. The route’s operating label remains the original source tag.", "sources": [ "frontier" ] }, { "id": "arelion", "name": "Arelion", "network": "fiber", "kind": "company", "aliases": [ "Arelion" ], "operators": [ "Arelion" ], "ownership": [ { "name": "Polhem Infra", "interest": "Corporate owner" } ], "note": "Company ownership is documented; no exact cable-system title is inferred from the corporate relationship.", "sources": [ "arelion" ] }, { "id": "tampnet", "name": "Tampnet", "network": "fiber", "kind": "company", "aliases": [ "Tampnet", "Tampnet AS" ], "operators": [ "Tampnet" ], "ownership": [ { "name": "3i Infrastructure", "interest": "Corporate shareholder", "percent": 50 }, { "name": "ATP", "interest": "Corporate shareholder", "percent": 50 } ], "note": "Tampnet identifies this ownership structure as in place since March 2019.", "sources": [ "tampnet" ] }, { "id": "telxius", "name": "Telxius", "network": "fiber", "kind": "company", "aliases": [ "Telxius" ], "operators": [ "Telxius" ], "ownership": [ { "name": "Telefónica", "interest": "Corporate shareholder", "percent": 70 }, { "name": "Pontegadea", "interest": "Corporate shareholder", "percent": 30 } ], "note": "The February 2026 company announcement provides the shareholder split.", "sources": [ "telxius" ] }, { "id": "bt", "name": "BT Group", "network": "fiber", "kind": "company", "aliases": [ "BT", "BT Group", "BT Group plc", "British Telecom" ], "operators": [ "BT group companies" ], "ownership": [ { "name": "Bharti Enterprises", "interest": "Approximate strategic shareholding in the March 2026 results", "percent": 24.5 }, { "name": "Other public shareholders", "interest": "Remaining interests; individual positions are not enumerated here" } ], "note": "This is a dated group shareholding, not an ownership percentage for a submarine cable.", "sources": [ "bt" ] }, { "id": "openreach", "name": "Openreach", "network": "fiber", "kind": "company", "aliases": [ "Openreach", "Openreach Limited" ], "operators": [ "Openreach Limited" ], "ownership": [ { "name": "BT Group", "interest": "Sole corporate parent", "percent": 100 } ], "note": "Openreach remains a distinct company within BT Group.", "sources": [ "openreach" ] }, { "id": "telenor", "name": "Telenor", "network": "fiber", "kind": "company", "aliases": [ "Telenor", "Telenor ASA" ], "operators": [ "Telenor group companies" ], "ownership": [ { "name": "Norwegian State", "interest": "Published shareholding as of 2026-02-27", "percent": 53.97 }, { "name": "Other shareholders", "interest": "Remaining interests; not a full beneficial-ownership register" } ], "note": "The published state interest applies to Telenor ASA.", "sources": [ "telenor" ] }, { "id": "iroquois", "name": "Iroquois Gas Transmission System", "network": "gas", "kind": "system", "aliases": [ "Iroquois Gas Trans Co", "Iroquois Pipeline Co", "Iroquois Gas Transmission System", "Iroquois Gas Transmission System, L.P." ], "operators": [], "ownership": [ { "name": "TC Energy affiliates", "interest": "TC PipeLines LP 49.34% + TransCanada Iroquois LLC 0.66%", "percent": 50 }, { "name": "BHE GT&S affiliates", "interest": "Iroquois Inc. 24.07% + Iroquois GP Holding Company LLC 25.93%", "percent": 50 } ], "note": "BHE GT&S is part of Berkshire Hathaway Energy. The 50/50 totals roll up the four legal partners published by Iroquois.", "sources": [ "iroquois" ] }, { "id": "northern-natural", "name": "Northern Natural Gas", "network": "gas", "kind": "system", "aliases": [ "Northern Natural Gas Co", "Northern Natural Gas", "Northern Natural Gas Company" ], "operators": [ "Northern Natural Gas Company" ], "ownership": [ { "name": "Berkshire Hathaway Energy", "interest": "Corporate parent" }, { "name": "Berkshire Hathaway Inc.", "interest": "Ultimate corporate parent as of the 2024 filing" } ], "note": "Northern identifies itself as the system operator and a BHE subsidiary.", "sources": [ "nng", "bhe" ] }, { "id": "kern-river", "name": "Kern River Gas Transmission", "network": "gas", "kind": "system", "aliases": [ "Kern River Gas Trans Co", "Kern River Gas Transmission Company" ], "operators": [ "Kern River Gas Transmission Company" ], "ownership": [ { "name": "Berkshire Hathaway Energy", "interest": "Corporate group" }, { "name": "Berkshire Hathaway Inc.", "interest": "Ultimate corporate parent as of the 2024 filing" } ], "note": "The annual filing identifies Kern River within BHE’s pipeline businesses.", "sources": [ "bhe" ] }, { "id": "california-gas", "name": "California Gas Transmission", "network": "gas", "kind": "system", "aliases": [ "California Gas Transmission Co", "California Gas Transmission" ], "operators": [ "California Gas Transmission · PG&E business unit" ], "ownership": [ { "name": "Pacific Gas and Electric Company", "interest": "Transmission and storage assets" } ], "note": "PG&E identifies CGT as the business unit operating and maintaining these gas assets.", "sources": [ "cgt" ] }, { "id": "transco", "name": "Transcontinental Gas Pipe Line (Transco)", "network": "gas", "kind": "system", "aliases": [ "Transcontinental Gas PL", "Transcontinental Gas Pipe Line Company", "Transcontinental Gas Pipe Line Company, LLC" ], "operators": [ "Transcontinental Gas Pipe Line Company, LLC" ], "ownership": [ { "name": "The Williams Companies", "interest": "Wholly owned subsidiary in the 2024 filing", "percent": 100 } ], "note": "The corporate interest applies to Transco as a company.", "sources": [ "williams" ] }, { "id": "northwest", "name": "Northwest Pipeline", "network": "gas", "kind": "system", "aliases": [ "Northwest Pipeline", "Northwest Pipeline LLC" ], "operators": [ "Northwest Pipeline LLC" ], "ownership": [ { "name": "The Williams Companies", "interest": "Wholly owned subsidiary in the 2024 filing", "percent": 100 } ], "note": "The corporate interest applies to Northwest Pipeline as a company.", "sources": [ "williams" ] }, { "id": "anr", "name": "ANR Pipeline", "network": "gas", "kind": "system", "aliases": [ "ANR Pipeline Co", "ANR Pipeline", "ANR Pipeline Company" ], "operators": [ "ANR Pipeline" ], "ownership": [ { "name": "TC Energy", "interest": "Corporate group; ANR joined in 2007" } ], "note": "The operator’s project page identifies ANR within TC Energy.", "sources": [ "anr" ] }, { "id": "gtn", "name": "Gas Transmission Northwest (GTN)", "network": "gas", "kind": "system", "aliases": [ "Gas Transmission - Northwest", "Gas Transmission Northwest LLC", "Gas Transmission Northwest" ], "operators": [ "Gas Transmission Northwest · TC Energy" ], "ownership": [ { "name": "TC Energy", "interest": "Corporate group; percentage not specified in this profile" } ], "note": "TC Energy’s project page identifies the GTN business and its operations.", "sources": [ "gtn" ] }, { "id": "tc-energy", "name": "TC Energy group", "network": "gas", "kind": "company", "aliases": [ "TC Energy", "TC Energy Corporation", "TransCanada", "TransCanada Pipelines", "TransCanada Pipelines Limited" ], "operators": [], "ownership": [ { "name": "Public shareholders", "interest": "Listed corporate group; subsidiary interests vary" } ], "note": "TransCanada Corporation became TC Energy in 2019. TransCanada PipeLines is a group entity. A group label alone does not establish the ownership split of an individual pipeline.", "sources": [ "tc" ] }, { "id": "fayetteville", "name": "Fayetteville Express Pipeline", "network": "gas", "kind": "system", "aliases": [ "Fayetteville Express Pipeline", "Fayetteville Express Pipeline LLC" ], "operators": [ "Energy Transfer" ], "ownership": [ { "name": "Kinder Morgan + Energy Transfer", "interest": "Joint venture through Fayetteville Express Pipeline LLC" } ], "note": "Ownership partners and operating company differ.", "sources": [ "km" ] }, { "id": "florida-gas", "name": "Florida Gas Transmission", "network": "gas", "kind": "system", "aliases": [ "Florida Gas Trans Co", "Florida Gas Transmission", "Florida Gas Transmission Company, LLC" ], "operators": [ "Energy Transfer" ], "ownership": [ { "name": "Kinder Morgan", "interest": "Through Citrus Corp.", "percent": 50 }, { "name": "Energy Transfer", "interest": "Through Citrus Corp.", "percent": 50 } ], "note": "Citrus owns FGT; Energy Transfer operates it.", "sources": [ "km" ] }, { "id": "midcontinent", "name": "Midcontinent Express Pipeline", "network": "gas", "kind": "system", "aliases": [ "Midcontinent Express Pipeline" ], "operators": [ "Kinder Morgan" ], "ownership": [ { "name": "Kinder Morgan", "interest": "Joint-venture interest", "percent": 50 }, { "name": "Energy Transfer", "interest": "Joint-venture interest", "percent": 50 } ], "note": "Kinder Morgan is the operating partner.", "sources": [ "km" ] }, { "id": "southern-natural", "name": "Southern Natural Gas", "network": "gas", "kind": "system", "aliases": [ "Southern Natural Gas Co", "Southern Natural Gas" ], "operators": [ "Kinder Morgan" ], "ownership": [ { "name": "Kinder Morgan", "interest": "Joint-venture interest", "percent": 50 }, { "name": "Southern Company", "interest": "Joint-venture interest", "percent": 50 } ], "note": "Kinder Morgan is the operating partner.", "sources": [ "km" ] }, { "id": "ngpl", "name": "Natural Gas Pipeline Company of America", "network": "gas", "kind": "system", "aliases": [ "Natural Gas PL Co of Am", "Natural Gas PL Co of America", "Natural Gas Pipeline Company of America", "Natural Gas Pipeline Co of America" ], "operators": [ "Kinder Morgan" ], "ownership": [ { "name": "Kinder Morgan + ArcLight-managed funds", "interest": "Ownership interests; percentages not supplied in this source" } ], "note": "The source separately identifies Kinder Morgan as operator.", "sources": [ "km" ] }, { "id": "tennessee", "name": "Tennessee Gas Pipeline", "network": "gas", "kind": "system", "aliases": [ "Tennessee Gas Pipeline", "Tennesse Gas Pipeline Co", "Tennessee Gas Pipeline Company" ], "operators": [ "Tennessee Gas Pipeline · Kinder Morgan" ], "ownership": [ { "name": "Kinder Morgan", "interest": "Corporate group" } ], "note": "Kinder Morgan identifies TGP within its pipeline business.", "sources": [ "km" ] }, { "id": "nexus", "name": "NEXUS Gas Transmission", "network": "gas", "kind": "system", "aliases": [ "NEXUS Gas Transmission", "NEXUS Gas Transmission LLC" ], "operators": [], "ownership": [ { "name": "Enbridge", "interest": "Joint-venture interest", "percent": 50 }, { "name": "DT Midstream", "interest": "Joint-venture interest", "percent": 50 } ], "note": "The current partner page names DT Midstream; historical DTE labels are not substituted silently.", "sources": [ "nexus" ] }, { "id": "texas-eastern", "name": "Texas Eastern Transmission", "network": "gas", "kind": "system", "aliases": [ "Texas Eastern Trans Co", "Texas Eastern Transmission", "Texas Eastern Transmission LP" ], "operators": [ "Texas Eastern Transmission · Enbridge" ], "ownership": [ { "name": "Enbridge", "interest": "System ownership" } ], "note": "Enbridge’s Texas Eastern project page identifies ownership.", "sources": [ "tetco" ] }, { "id": "enbridge", "name": "Enbridge", "network": "gas", "kind": "company", "aliases": [ "Enbridge", "Enbridge Inc." ], "operators": [], "ownership": [ { "name": "Public shareholders", "interest": "Listed corporate group; joint-venture interests vary" } ], "note": "This is corporate context for an exact Enbridge tag. Historical names such as Enbridge East Texas are not automatically matched to today’s group.", "sources": [ "enbridge" ] }, { "id": "guardian", "name": "Guardian Pipeline", "aliases": [ "Guardian Pipeline Co", "Guardian Pipeline", "Guardian Pipeline, L.L.C." ], "network": "gas", "kind": "system", "operators": [ "Guardian Pipeline · DT Midstream" ], "ownership": [ { "name": "DT Midstream", "interest": "Through DTM Interstate Transportation", "percent": 100 } ], "note": "DT Midstream’s 2025 filing records the completed acquisition from ONEOK on 2024-12-31.", "sources": [ "dtm" ] }, { "id": "midwestern", "name": "Midwestern Gas Transmission", "aliases": [ "Midwestern Gas Trans Co", "Midwestern Gas Transmission Company" ], "network": "gas", "kind": "system", "operators": [ "Midwestern Gas Transmission · DT Midstream" ], "ownership": [ { "name": "DT Midstream", "interest": "Through DTM Interstate Transportation", "percent": 100 } ], "note": "DT Midstream’s 2025 filing records the completed acquisition from ONEOK on 2024-12-31.", "sources": [ "dtm" ] }, { "id": "viking", "name": "Viking Gas Transmission", "aliases": [ "Viking Gas Transmission Co", "Viking Gas Transmission Company", "Viking Gas Tranmssion" ], "network": "gas", "kind": "system", "operators": [ "Viking Gas Transmission · DT Midstream" ], "ownership": [ { "name": "DT Midstream", "interest": "Through DTM Interstate Transportation", "percent": 100 } ], "note": "DT Midstream’s 2025 filing records the completed acquisition from ONEOK on 2024-12-31.", "sources": [ "dtm" ] }, { "id": "northern-border", "name": "Northern Border Pipeline", "network": "gas", "kind": "system", "aliases": [ "Northern Border PL Co", "Northern Border Pipeline", "Northern Border Pipeline Co", "Northern Border Pipeline Company" ], "operators": [], "ownership": [ { "name": "TC Energy", "interest": "Joint-venture interest", "percent": 50 }, { "name": "ONEOK", "interest": "Joint-venture interest", "percent": 50 } ], "note": "Each corporate owner separately publishes its 50% interest.", "sources": [ "tc", "oneok" ] }, { "id": "gulf-south", "name": "Gulf South Pipeline", "network": "gas", "kind": "system", "aliases": [ "Gulf South Pipeline Co", "Gulf South Pipeline", "Gulf South Pipeline Company, LLC" ], "operators": [ "Gulf South Pipeline · Boardwalk" ], "ownership": [ { "name": "Boardwalk Pipelines", "interest": "Corporate group" }, { "name": "Loews Corporation", "interest": "Wholly owns Boardwalk; ultimate parent" } ], "note": "The company site identifies its operating subsidiaries and corporate parent.", "sources": [ "boardwalk" ] }, { "id": "texas-gas", "name": "Texas Gas Transmission", "network": "gas", "kind": "system", "aliases": [ "Texas Gas Transmission Co", "Texas Gas Transmission", "Texas Gas Transmission, LLC" ], "operators": [ "Texas Gas Transmission · Boardwalk" ], "ownership": [ { "name": "Boardwalk Pipelines", "interest": "Corporate group" }, { "name": "Loews Corporation", "interest": "Wholly owns Boardwalk; ultimate parent" } ], "note": "This profile is specific to Texas Gas Transmission, not every Texas gas pipeline.", "sources": [ "boardwalk" ] }, { "id": "southern-star", "name": "Southern Star Central Gas Pipeline", "network": "gas", "kind": "system", "aliases": [ "Southern Star Central Gas PL Co", "Southern Star Central Gas Pipeline", "Southern Star Central Gas Pipeline, Inc." ], "operators": [ "Southern Star Central Gas Pipeline" ], "ownership": [ { "name": "CDPQ", "interest": "Majority investor in the company’s August 2024 account" }, { "name": "Ullico Infrastructure Fund", "interest": "Minority investor in the company’s August 2024 account" } ], "note": "The company’s ownership history supplies majority/minority roles, without percentages.", "sources": [ "southernstar" ] }, { "id": "fortisbc", "name": "FortisBC gas business", "network": "gas", "kind": "company", "aliases": [ "FortisBC", "Fortis BC", "FortisBC Energy Inc." ], "operators": [ "FortisBC Energy Inc." ], "ownership": [ { "name": "Fortis Inc.", "interest": "Ultimate corporate parent; FortisBC Holdings is the gas holding company" } ], "note": "FortisBC identifies FortisBC Energy as the gas utility. The similarly named electric utility is a different legal entity.", "sources": [ "fortis" ] }, { "id": "alliance", "name": "Alliance Pipeline", "network": "gas", "kind": "system", "aliases": [ "Alliance Pipeline", "Alliance Pipeline System", "Alliance" ], "operators": [ "Pembina / Alliance Pipeline" ], "ownership": [ { "name": "Pembina Pipeline Corporation", "interest": "System ownership", "percent": 100 } ], "note": "Pembina completed the acquisition of Enbridge’s remaining interest on 2024-04-01; its 2025 filing describes Alliance ownership and operations.", "sources": [ "pembina", "allianceSale" ] }, { "id": "columbia-gas", "name": "Columbia Gas Transmission", "aliases": [ "Columbia Gas Trans Co", "Columbia Gas Transmission", "Columbia Gas Transmission, LLC" ], "network": "gas", "kind": "system", "operators": [ "Columbia Gas Transmission · TC Energy" ], "ownership": [ { "name": "TC Energy", "interest": "Voting interest in the 2025 corporate structure", "percent": 60 }, { "name": "Global Infrastructure Partners", "interest": "Non-controlling joint-venture interest", "percent": 40 } ], "note": "The company filing and completed transaction identify the interests at the named-system level.", "sources": [ "tcAif", "columbia" ] }, { "id": "columbia-gulf", "name": "Columbia Gulf Transmission", "aliases": [ "Columbia Gulf Pipeline", "Columbia Gulf Transmission", "Columbia Gulf Transmission, LLC" ], "network": "gas", "kind": "system", "operators": [ "Columbia Gulf Transmission · TC Energy" ], "ownership": [ { "name": "TC Energy", "interest": "Voting interest in the 2025 corporate structure", "percent": 60 }, { "name": "Global Infrastructure Partners", "interest": "Non-controlling joint-venture interest", "percent": 40 } ], "note": "The company filing and completed transaction identify the interests at the named-system level.", "sources": [ "tcAif", "columbia" ] }, { "id": "oneok-transport", "name": "ONEOK Gas Transportation", "aliases": [ "ONEOK Gas Transportation LLC", "ONEOK Gas Transportation, L.L.C." ], "network": "gas", "kind": "system", "operators": [ "ONEOK Gas Transportation" ], "ownership": [ { "name": "ONEOK", "interest": "Wholly owned pipeline business", "percent": 100 } ], "note": "ONEOK lists this business in its natural gas pipelines segment.", "sources": [ "oneok" ] }, { "id": "enlink-lig", "name": "EnLink LIG (Louisiana Intrastate Gas)", "aliases": [ "Louisiana Intrastate Gas Co", "EnLink LIG", "EnLink LIG, L.L.C." ], "network": "gas", "kind": "system", "operators": [ "EnLink LIG (Louisiana Intrastate Gas)" ], "ownership": [ { "name": "ONEOK", "interest": "Wholly owned pipeline business", "percent": 100 } ], "note": "ONEOK lists this business in its natural gas pipelines segment.", "sources": [ "oneok" ] }, { "id": "oneok-westex", "name": "ONEOK WesTex Transmission", "aliases": [ "ONEOK Westex Pipeline", "ONEOK WesTex Transmission, L.L.C." ], "network": "gas", "kind": "system", "operators": [ "ONEOK WesTex Transmission" ], "ownership": [ { "name": "ONEOK", "interest": "Wholly owned pipeline business", "percent": 100 } ], "note": "ONEOK lists this business in its natural gas pipelines segment.", "sources": [ "oneok" ] }, { "id": "houston-pipeline", "name": "Houston Pipe Line", "aliases": [ "Houston Pipeline Co", "Houston Pipe Line Company LP", "Houston Pipeline" ], "network": "gas", "kind": "system", "operators": [ "Houston Pipe Line · Energy Transfer" ], "ownership": [ { "name": "Energy Transfer", "interest": "Reported system interest at 2025 year-end", "percent": 100 } ], "note": "System-level interest from the annual filing.", "sources": [ "et" ] }, { "id": "enable-gas", "name": "Enable Gas Transmission", "aliases": [ "Enable Gas Transmission", "Enable Gas Transmission, LLC" ], "network": "gas", "kind": "system", "operators": [ "Enable Gas Transmission · Energy Transfer" ], "ownership": [ { "name": "Energy Transfer", "interest": "Reported system interest at 2025 year-end", "percent": 100 } ], "note": "System-level interest from the annual filing.", "sources": [ "et" ] }, { "id": "mississippi-river", "name": "Mississippi River Transmission", "aliases": [ "Mississippi River Trans Corp", "Enable Mississippi River Transmission, LLC" ], "network": "gas", "kind": "system", "operators": [ "Mississippi River Transmission · Energy Transfer" ], "ownership": [ { "name": "Energy Transfer", "interest": "Reported system interest at 2025 year-end", "percent": 100 } ], "note": "System-level interest from the annual filing.", "sources": [ "et" ] }, { "id": "panhandle", "name": "Panhandle Eastern Pipe Line", "aliases": [ "Panhandle Eastern PL Co", "Panhandle Eastern PL", "Panhandle Eastern Pipe Line Company, LP" ], "network": "gas", "kind": "system", "operators": [ "Panhandle Eastern Pipe Line · Energy Transfer" ], "ownership": [ { "name": "Energy Transfer", "interest": "Reported system interest at 2025 year-end", "percent": 100 } ], "note": "System-level interest from the annual filing.", "sources": [ "et" ] }, { "id": "trunkline", "name": "Trunkline Gas", "aliases": [ "Trunkline Gas Co", "Trunkline Gas Company, LLC" ], "network": "gas", "kind": "system", "operators": [ "Trunkline Gas · Energy Transfer" ], "ownership": [ { "name": "Energy Transfer", "interest": "Reported system interest at 2025 year-end", "percent": 100 } ], "note": "System-level interest from the annual filing.", "sources": [ "et" ] }, { "id": "transwestern", "name": "Transwestern Pipeline", "aliases": [ "Transwestern Pipeline Co", "Transwestern Pipeline Company, LLC" ], "network": "gas", "kind": "system", "operators": [ "Transwestern Pipeline · Energy Transfer" ], "ownership": [ { "name": "Energy Transfer", "interest": "Reported system interest at 2025 year-end", "percent": 100 } ], "note": "System-level interest from the annual filing.", "sources": [ "et" ] }, { "id": "westcoast", "name": "Westcoast gas pipeline system", "network": "gas", "kind": "system", "aliases": [ "Westcoast Energy", "Westcoast Energy Inc.", "Westcoast Energy Inc., Carrying On Business As Spectra Energy Transmission" ], "operators": [ "Westcoast / Enbridge" ], "ownership": [ { "name": "Enbridge", "interest": "Remaining majority interest" }, { "name": "Stonlasec8 Indigenous Alliance Limited Partnership", "interest": "Equity investment closed 2025-07-02", "percent": 12.5 } ], "note": "The 2025 filing records the completed Indigenous equity investment; older source fields may name Spectra.", "sources": [ "westcoast" ] } ], "coverage": { "layers": { "fiber": { "records": 9234, "companyMatched": 5335, "sourceSegmentsMatched": 5335 }, "us_gas": { "records": 259, "companyMatched": 42, "sourceSegmentsMatched": 21360 }, "canada_gas": { "records": 2304, "companyMatched": 411, "sourceSegmentsMatched": 411 }, "gas_crossings": { "records": 59, "companyMatched": 26, "sourceSegmentsMatched": 26 } }, "submarine": { "records": 1337, "companyMatched": 99 } } }